spi: rockchip: Drop unused and broken CR0 macros

spi: rockchip: Drop unused and broken CR0 macros

Two CTRLR0 macros are defined but never referenced, and both are wrong:

 - CR0_XFM_MASK shifts by SPI_XFM_OFFSET, which does not exist anywhere
   in the tree. The intended symbol is CR0_XFM_OFFSET.

 - CR0_MTM_OFFSET is defined as 0x21, i.e. bit 33 of a 32-bit register.
   The value is meaningless and the macro is unused.

Drop both. They can be re-introduced correctly when an actual user
appears.

Signed-off-by: John Madieu <john.madieu@gmail.com>
Link: https://patch.msgid.link/20260425092936.2590132-3-john.madieu@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>